FSLogix Virtualization Driver FileId Cache – OS Test
When a user’s virtual desktop opens a file, the virtualization driver manages the file access and assigns a unique file ID to that file in the operating system or file system. The FileID cache stores these IDs along with metadata about the file (such as its location, permissions, etc.) so that future accesses to the same file can skip the step of querying the storage system to retrieve the file’s information again. This means that, even if the user opens the same file multiple times, the cache allows the system to quickly resolve the file reference and access it without additional overhead. Without a file ID cache, each access to a file might require looking up its file handle on the back-end file server, creating additional load on both the file system and the network. The cache reduces this load by storing the file handles locally in memory.
This test monitors the virtualization driver FileId cache, and reports the number of entries added/deleted/replaced. In addition, this test helps the administrator analyze if there is a need for extra memory resources.
Target of the test : An Omnissa Horizon desktop on the cloud
Agent deploying the test : A Remote agent
Outputs of the test : One set of results for the target virtual server to be monitored.
| Parameter | Description |
|---|---|
|
Test Period |
How often should the test be executed. |
|
Host |
The nick name of the Omnissa Horizon Desktops component for which this test is to be configured. |
|
Port |
Refers to the port at which the specified host listens to. By default, this is NULL. |
|
Inside View Using |
To obtain the 'inside view' of performance of the cloud-hosted Omnissa Horizon desktops - i.e., to measure the internal performance of the Omnissa Horizon desktops - this test uses a light-weight eG VM Agent software deployed on each of the desktops. Accordingly, this parameter is by default set to eG VM Agent (Omnissa Horizon). |
|
Report By User |
This flag is set to Yes by default. The value of this flag cannot be changed. This implies that the virtual machines in VDI environments will always be identified using the login name of the user. In other words, in VDI environments, this test will, by default, report measures for every username_on_virtualmachinename. |
|
Report Powered OS |
This flag is relevant only for those tests that are mapped to the Inside View of Desktops layer. If this flag is set to Yes (which is the default setting), then the 'inside view' tests will report measures for even those Omnissa Horizon desktops that do not have any users logged in currently. Such desktops will be identified by their name and not by the username_on_virtualdesktopname. On the other hand, if this flag is set to No, then this test will not report measures for those Omnissa Horizon desktops to which no users are logged in currently. |
|
Is Cloud VMs |
Since this test runs for 'Omnissa Horizon Desktops' component which is a cloud-hosted desktop group, this flag is set to Yes by default. |
|
Measurement |
Description |
Measurement Unit |
Interpretation |
|---|---|---|---|
|
Added entries |
Indicates the number of new entries added to the Virtualization Driver FileID cache. |
Number |
|
|
Current entries |
Indicates the number of entries currently available in the Virtualization Driver FileID cache. |
Number |
|
|
Current memory usage |
Indicates the amount of memory currently used by the Virtualization Driver FileID cache. |
MB |
A low value is desired for this measure. While sporadic spikes in memory usage could be caused by one/more rogue processes on the Virtualization Driver FileID cache, a consistent increase in this value could be a cause for some serious concern, as it indicates a gradual, but steady erosion of valuable memory resources. |
|
Deleted entries |
Indicates the number of entries deleted from the Virtualization Driver FileID cache. |
Number |
|
|
Entry access interval |
Indicates the time interval it takes for the Virtualization Driver FileID cache between adding two different entries. |
Seconds |
A low value of this measure is desired. |
|
Maximum access interval |
Indicates the maximum time interval it takes for the Virtualization Driver FileID cache between adding two different entries. |
Seconds |
|
|
Replaced entries |
Indicates the number of entries that were replaced in the Virtualization Driver FileID cache. |
Number |
|
